Solve the problem using matrices.Melody has $45,000 to invest and wishes to receive an annual income of $4290 from this money. She has chosen investments that pay 5%, 8%, and 12% simple interest. Melody wants to have the amount invested at 12% to be double the amount invested at 8%. How much should she invest at each rate?
What will be an ideal response?
$9000 at 5%, $12,000 at 8%, and $24,000 at 12%
Mathematics
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